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Mathematical models prepared by the CDC show that at least 1 million Americans have been infected by the H1N1 flu. Even with the flu season coming to an end, "it doesn't look like transmission [of the H1N1 flu] is declining at all," a CDC official said. WHO Director-General Margaret Chan said as of now, the virus is "still very stable" but has great mutation potential.

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There is a need for "political goodwill" to ensure that A/H1N1 flu vaccines are distributed to developing countries, said Keiji Fukuda, World Health Organization assistant director-general. WHO Director-General Margaret Chan said laboratories are considering several ways to hasten vaccine production, including making a new vaccine by adding a new component to the vaccine currently used for seasonal flu. The new virus has caused 89,921 infections in 125 countries and territories, including 382 deaths, the WHO said.

Mathematical models prepared by the CDC show that at least 1 million Americans have been infected by the H1N1 flu. Even with the flu season coming to an end, "it doesn't look like transmission [of the H1N1 flu] is declining at all," a CDC official said. WHO Director-General Margaret Chan said as of now, the virus is "still very stable" but has great mutation potential.

Forty-eight percent of HIV-positive adolescents and young adults are unaware of their status, CDC researchers said after reviewing data from a 2007 survey of students in grades 9 through 12. Researchers also found that only 22% of sexually active high-school students get tested for HIV, with older students and girls more likely to have an HIV test.

Mathematical models prepared by the CDC show that at least 1 million Americans have been infected by the H1N1 flu. Even with the flu season coming to an end, "it doesn't look like transmission [of the H1N1 flu] is declining at all," a CDC official said. WHO Director-General Margaret Chan said as of now, the virus is "still very stable" but has great mutation potential.

CDC officials informed doctors that they can resume giving a vaccine against the Haemophilus influenza type B bacterium to babies older than 6 months and start administering "catch-up" shots to those who missed it. The announcement marks the end of a shortage that began in 2007, when Merck recalled the drug because of sterility issues.